Furnace-grate.



C. F. NEWPORT.

FURNACE GRATE.

APPLICATION FILED JUNE 19,1912.

1,068,811. Patented July 29, 1913.

2 SHEETS-SHEET 1.

COLUMBIA PLANOQRAPH C0-. WASHINGTON. D. :1

C. F. NEWPORT.

FURNACE GRATE. APPLIOATION FILED JUNE 19, 1912.

2 SHEETS-SHEET 2.

COLUMBIA PLANOGRAPH col. y/ismua-rou. n. c,

'CHAItLES IF. NEWPORT, or CH CA O, ILLINOIS.

FTIRNAGE-GRA'IE.

Specification of Letters Patent.

Patented July 29, 1913.

Original application filed May 15, 1911, Serial No. 627,200. Divided andthis application filed June 19, 1912. Serial No. 704,585.

To all whom it may concern:

Be it known that I, CHARLES F. Nnwrom, a citizen of the United States,and a resident of Chicago, in the. county of Cook and the 5 State ofIllinois, have invented certain new and useful Improvements in Fu'rnace-Grates; and I do hereby declare that the following is a full, clear,exact description 5 thereof, reference being had to the accompanyingdrawings, and to the characters of reference marked thereon, which forma part 5 of the specification.

This invention relates to improvements in grates for furnaces, and theinvention is herein shown as applied to the furnace of a domestic waterheater or steam generator.

Among the objects of the invention is to provide an improved grate withmeans for clearing the same of ashes and clinkers, and with means foragitating the fuel bed to induce combustion, and for dumping the firebed to the ash pit below; and the invention consists in the mattershereinafter set forth and more particularly pointed out in the appendedclaims.

In the drawings;Figure 1 is a transverse vertical section on the-line 11of Fig. 2, the same being taken in a plane between adjacent heatersections at one side of the figure, and through one of the heatersections at the other side thereof. Fig. 2 is a vertical section on theindirect line 22 of Fig. 1. Fig. 3 is a detail sect-ion on the line ofFig. 1. i

The general construction of the heater is the same as shown in mypending application for U. S. Letters Patent, No. 627,200, filed May15th, 1911 of which this application is a division.

The heater comprises, in general terms, two groups of hollow or coredout cast metal sections 9, one atone side and the other at the otherside of an intermediate fire box 10, the latter equipped with a fuelgrate 11, arranged above an ash pit 12. Each of the cast metal sectionsof the heater is made hollow to provide therein a water space 13, andthe water spaces of the several sections communicate with each otherthrough connecting nipples 14, 15 respectively. Said sections are ofsuch thickness at their lower and upper end parts and along their outermarginal parts as to fit closely together, while the central parts ofthe sections abreast the the box are made thinner so as to form betweenthe thinner portions of said sections lateral fines or passages 17 forthe heated gases to pass upwardly from the fire box; said fines orpassages communicating through lines 18, 19 at the sides of the heaterwith a smoke box 20 at the rear of the furnace in the manner clearlydescribed in aforesaid pending application.

Fuel is fed to'the fire box 10 from a mag-a zine 25, located at the topof the heat-er, between adjustably supported throat pieces 26 supportedon the front and rear walls of the heater at the inner parts of theupper overhanging portions 27 of the heater sections; saidthroatpiecesbeing designed to be adjusted toward and from each other to adapt theheater to different kinds of fuel, in the manner fully set forth inaforesaid pending application.

Referring now to the construction of the grate and associated mechanismwhich constitutes the present invention, and which is adapted to beapplied to the general type of furnace set forth and to other types offurnaces, the same is made as follows: Said grate comprises two sets ofrocking bars 30, 30, one at each side of the center of the furnace andarranged to incline downwardly and outwardly from a central tubularridge bar 31-, that is supported at its ends in any suitable manner inthe front and rear walls of the furnace. Said rocking grate bars aremounted at their lower ends to rock or rotate in sockets 32 formed inthe inner sides of the, heater sections 9, and are mounted at theirupper ends to rock or rotate in U- shaped sockets 33 atthe sides of theridge bar. Said rocker bars carry grate fingers 35, of any usual orpreferred construction, which constitute the support for the fuel bed.Said fingers are arranged to lap one over the other so as to be rockedpast each other, when the bars are rocked on their axes, to clear thegrate of clinkers. The said grate bars are adapted to be rocked in theirbearings to agitate the fire bed and to clear the bars of clinkers bymeans of endwise recip rocable actuating bars 36, arranged one at eachside of the furnace and having the form of elongated cast metal plates,as best shown in Fig. 2. Said actuating bars extend from front to rearof the furnace and are arranged above the outer or lower ends of thegrate bars and, as herein shown, are disposed in planes at right anglesto the planes of the adjacent grate bars. Said actuating bars 36 aremade of such width as to constitute a substantial support for the fuelbed at the lower or outer sides thereof. They are connected to therocking grate bars by means of upturned crank arms 38 on the grate barswhich are provided at their upper ends with inturned ends 39 that engagewith transverse recesses 1O formed in the outer or rear sides of saidactuating bars, as clearly shown in Fig. 1. The arrangement is such thatendwise reciprocation of the actuating bars 36 transmits, through thecrank arms 38, a simultaneous rocking motion to all of the grate barsthus connected therewith.

The said grate actuating bars 36 are pro-. vided at the forward end ofthe furnace with extensions 12 which project through the front wall 43of the furnace, and said extensions are pivotally connected at 4:4 tooperating levers 45 which latter, are in turn, pivotally mounted onbrackets or lugs i6 that are attached in any suitable manner to andproject forwardly from the front wall of the furnace. When the levers 45are swung throughout their full range and the grate actuating bars arefully reciprocated, the grate bars are rocked to agitate the fuel bedsupported thereby and to clear the grate of clinkers which may adherethereto, and also to dump the fire.

As a further improvement the said recesses 40 which receive the inturnedends of the crank arms 38 are made slightly wider than the diameter ofsaid int-urned ends of the arms so as to thereby permit slight lostmotion of said actuating bars relatively to said arms. By reason of thesubstantial support given to the fuel bed by the relatively wide orbroad grate actuating bars 36, such slight movement of the actuatingbars, relatively to the grate bars, serves to loosen up the fuel bed inthe portions thereof supported by the actuating bars and without givingmovement or actuation to the grate bars. The said actuating bars may beprovided with openings 50 to permit air to pass therethrough to the fuelbed above to thereby furnish additional air to the fuel bed.

In order to increase the stirring action due to the reciprocal movementof the grate actuating bars 36, either when the bars are moved slightlywithout rocking the grate bars, or when they are given full movement torock the grate bars, the inner faces of said actuating bars in contactwith the fuel bed may be roughened, as by providing them with thetransverse ribs 47, shown best in Fig. 2. Such roughened surfaces serveto increase the stirring or agitating action of the movable actuatingbars against the fuel bed. This function of the actuating bars alsoserves to prevent the accumulation of ashes and clinkers at the lowerends of the grate bars and to facilitate the dis charge thereof throughthe grate to the ash pit below.

I claim as my invention 1. In a furnace, a fire box, a grate comprisingrocking bars extending transversely of the fire box and arrangedobliquely tothe horizontal, a reciprocable actuating bar arranged at theside of the fire box and extending from front to rear thereof above thelower ends of the grate bars and connected to the grate bars by meanspermitting lost motion between said parts, said actuating bar being madeof substantial width to support the fuel at the lower ends of the gratebar and being roughened on its inner surface.

2. The combination with the rocking grate bars of a furnace, of anactuating member arranged above the rocking bars and having asubstantially broad surface to support the fuel bed, with means forconnecting the same to said grate bars the surface of the actuating barin contact with the fuel bed being roughened, for the purpose set forth.

3. In a furnace, a gratecomprising two and endwise reciprocableactuating bars at the sides of the fire box arranged transversely overand above the outer lower ends of. the grate bars and having means forconnecting them with the grate bars to rock the latter, said actuatingbars being roughened on their inner sides toward the fuel bed.

4:. In a furnace, a grate comprising two sets of rocking grate barsextending obliquely downwardly from a central support in the furnace tothe sides of the furnace and endwise reciprocable actuating bars at thesides of the fire box arranged transversely over and above the outerlower ends of the grate bars and having means for connecting th-e-m withthe grate bars to rock the latter, said actuating bars being made ofCHARLES F. NEWPORT.

Witnesses G. E. DOWLE, W. L. HALL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

' Washington, D. G.

